The Audacity of Change: A Transition to Nonstationary and Nonlinear Era
by Dr. Ahsan Kareem
Showing posts with label typhoon. Show all posts
Showing posts with label typhoon. Show all posts
Monday, September 21, 2009
Thursday, June 11, 2009
The Multi-Hazard Threat
(In addition to features about research in the NatHaz lab, we will periodically post news reports of interest which might spark interesting conversations)
As engineers, we typically like to focus on one problem at a time. However, multiple hazards occurring at the same time present an interesting puzzle for risk assessment and engineering design.
This report, Typhoons trigger earthquakes on Taiwan (click link for news report), highlights research which identifies sensor recordings of 20 "slow" earthquakes coinciding with 11 typhoons. The "slow" earthquake unfolds over a hours or days, rather than a few minutes or seconds. The researchers suggest that the low atmospheric pressure generated by the typhoon actually relieves pressure on one side of the converging plates. Interestingly, it is theorized that the stress relief caused by the typhoon may actually inhibit larger earthquakes from occurring, periodically releasing the stress build-up.
The question that remains is how do tall structures in Taiwan react to both the occurrence of "slow" earthquakes and wind action of the typhoon?
As engineers, we typically like to focus on one problem at a time. However, multiple hazards occurring at the same time present an interesting puzzle for risk assessment and engineering design.
This report, Typhoons trigger earthquakes on Taiwan (click link for news report), highlights research which identifies sensor recordings of 20 "slow" earthquakes coinciding with 11 typhoons. The "slow" earthquake unfolds over a hours or days, rather than a few minutes or seconds. The researchers suggest that the low atmospheric pressure generated by the typhoon actually relieves pressure on one side of the converging plates. Interestingly, it is theorized that the stress relief caused by the typhoon may actually inhibit larger earthquakes from occurring, periodically releasing the stress build-up.
The question that remains is how do tall structures in Taiwan react to both the occurrence of "slow" earthquakes and wind action of the typhoon?
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